Service Information

Volt

Symptoms - Entertainment

Important: The following steps must be completed before using the symptom table.

Perform the Diagnostic System Check - Vehicle before using the Symptom Tables in order to verify that all of the following are true:

•	There are no DTCs set.

•	The control modules can communicate via the serial data link.

Review the system operation in order to familiarize yourself with the system functions. Refer to Radio/Audio System Description and Operation .

•	Inspect for aftermarket devices which could affect the operation of the Radio/Audio System. Refer to Checking Aftermarket Accessories .

•	Inspect for easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

•	Auxiliary Audio Input Malfunction

•	No Global Positioning System (GPS) Reception

•	Radio Controls Malfunction

•	Radio Information Display Malfunction - DTC U0257

•	Radio Poor Reception

•	Speaker Malfunction